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  2. Pointing stick - Wikipedia

    en.wikipedia.org/wiki/Pointing_stick

    A Dell Latitude E4310 laptop with a pointing stick (upper middle) and a touchpad (bottom). They were commonly featured together on Dell Latitude laptops, beginning in the late 1990s. The pointing stick can be used in ultra-compact netbooks [13] where there would be no place for a touchpad.

  3. Wireless ambulatory ECG - Wikipedia

    en.wikipedia.org/wiki/Wireless_ambulatory_ecg

    Wireless ambulatory ECGs work in a way similar to a regular ECG by measuring the electrical potential of the heart through the skin. The data is saved on an application on a smartphone, and then uploaded to a computer through Bluetooth or cloud technologies. The information can also be sent through these technologies or through email to a ...

  4. Holter monitor - Wikipedia

    en.wikipedia.org/wiki/Holter_monitor

    Each Holter system has hardware (called monitor or recorder) for recording the signal, and software for review and analysis of the record. There may be a "patient button" on the front that the patient can press at specific instants such as feeling/being sick, going to bed, taking pills, marking an event of symptoms which is then documented in the symptoms diary, etc.; this records a mark that ...

  5. Electrocardiography - Wikipedia

    en.wikipedia.org/wiki/Electrocardiography

    It is an electrogram of the heart which is a graph of voltage versus time of the electrical activity of the heart [5] using electrodes placed on the skin. These electrodes detect the small electrical changes that are a consequence of cardiac muscle depolarization followed by repolarization during each cardiac cycle (heartbeat). Changes in the ...

  6. Pacemaker - Wikipedia

    en.wikipedia.org/wiki/Pacemaker

    The pacemaker generator is a hermetically sealed device containing a power source, usually a lithium battery, a sensing amplifier which processes the electrical manifestation of naturally occurring heart beats as sensed by the heart electrodes, the computer logic for the pacemaker and the output circuitry which delivers the pacing impulse to ...

  7. Defibrillation - Wikipedia

    en.wikipedia.org/wiki/Defibrillation

    Defibrillation is a treatment for life-threatening cardiac arrhythmias, specifically ventricular fibrillation (V-Fib) and non-perfusing ventricular tachycardia (V-Tach). [1] [2] A defibrillator delivers a dose of electric current (often called a counter-shock) to the heart.

  8. Computer keyboard - Wikipedia

    en.wikipedia.org/wiki/Computer_keyboard

    The keyboard sends the key code to the keyboard driver running in the main computer; if the main computer is operating, it commands the light to turn on. All the other indicator lights work in a similar way. The keyboard driver also tracks the Shift, alt and control state of the keyboard.

  9. Implantable cardioverter-defibrillator - Wikipedia

    en.wikipedia.org/wiki/Implantable_cardioverter...

    Illustration of Implantable Cardioverter Defibrillator (ICD) An implantable cardioverter-defibrillator (ICD) or automated implantable cardioverter defibrillator (AICD) is a device implantable inside the body, able to perform defibrillation, and depending on the type, cardioversion and pacing of the heart.